I modified my application to use the intervideosink and intervediosrc but I am getting a crash when the playbin pipeline is started. I reproduced the problem in the included test application. With debugging at level 4, the diagnostic output indicated the assertion below. Any suggestions on what I am doing wrong or where the problem is? I am using release 1.8.0. 0:00:00.232899237 14216 00000000041C1140 INFO GST_STATES gstelement.c:2277:_priv_gst_element_state_changed:<playbin0> notifying about state-changed PAUSED to PLAYING (VOID_PENDING pending) 0:00:00.232934304 14216 0000000002B04000 INFO GST_BUS gstbus.c:565:gst_bus_timed_pop_filtered:<bus1> we got woken up, recheck for message 0:00:00.247985542 14216 00000000033EE440 INFO GST_EVENT gstevent.c:679:gst_event_new_caps: creating caps event video/x-raw, format=(string)I420, width=(int)1442, height=(int)1011, interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1 0:00:00.248142062 14216 00000000033EE440 INFO basetransform gstbasetransform.c:1367:gst_base_transform_setcaps:<capsfilter0> reuse caps 0:00:00.248173709 14216 00000000033EE440 INFO GST_EVENT gstevent.c:679:gst_event_new_caps: creating caps event video/x-raw, format=(string)I420, width=(int)1442, height=(int)1011, interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1 0:00:00.248360165 14216 00000000033EE440 INFO basetransform gstbasetransform.c:1367:gst_base_transform_setcaps:<videoconvert0> reuse caps 0:00:00.248417043 14216 00000000033EE440 INFO GST_EVENT gstevent.c:679:gst_event_new_caps: creating caps event video/x-raw, format=(string)I420, width=(int)1442, height=(int)1011, interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)mpeg2, colorimetry=(string)bt709, framerate=(fraction)25/1 0:00:00.249147902 14216 00000000033EE440 INFO libav :0:: Assertion v>0 && v<=(1 ? 32 : 16) failed at libavutil/mem.c:233 This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information. #include <gst/gst.h> GstElement* buildPipeline(char* pipelineDescription) { GError* error=NULL; GstElement* pipeline = gst_parse_launch(pipelineDescription, &error); if(error != NULL) { g_printerr("Error: %s\n", error->message); return NULL; } if(pipeline == NULL) { g_printerr("Error creating pipeline\n"); return NULL; } return pipeline; } gint main (gint argc, gchar *argv[]) { GstStateChangeReturn retSink; GstStateChangeReturn retSrc; // init GStreamer gst_init (&argc, &argv); char* sinkPipelineDescription = "playbin uri=file:///C:/gstreamer/1.0/x86_64/bin/captureMakLand.mpeg"; char* srcPipelineDescription ="intervideosrc channel=V1 ! video/x-raw,framerate=25/1 ! videoconvert ! avenc_mpeg2video ! mpegtsmux ! udpsink host=127.0.0.255 port=5000"; // setup pipeline GstElement* mySinkPipeline = buildPipeline(sinkPipelineDescription); GstElement* mySrcPipeline = buildPipeline(srcPipelineDescription); if (mySinkPipeline && mySrcPipeline) { GstElement* interVideoSink = gst_element_factory_make("intervideosink", "interVideoSink"); g_object_set (GST_OBJECT (interVideoSink), "channel", "V1", NULL); g_object_set (GST_OBJECT (mySinkPipeline), "video-sink", interVideoSink, NULL); retSrc = gst_element_set_state (mySrcPipeline, GST_STATE_PLAYING); retSink = gst_element_set_state (mySinkPipeline, GST_STATE_PLAYING); if (retSink != GST_STATE_CHANGE_FAILURE && retSrc != GST_STATE_CHANGE_FAILURE) { /* Wait until error or EOS */ GstBus *bus = gst_element_get_bus (mySinkPipeline); GstMessage *msg = gst_bus_timed_pop_filtered (bus, GST_CLOCK_TIME_NONE, GstMessageType(GST_MESSAGE_ERROR | GST_MESSAGE_EOS)); /* Parse message */ if (msg != NULL) { GError *err; gchar *debug_info; switch (GST_MESSAGE_TYPE (msg)) { case GST_MESSAGE_ERROR: gst_message_parse_error (msg, &err, &debug_info); g_printerr ("Error received from element %s: %s\n", GST_OBJECT_NAME (msg->src), err->message); g_printerr ("Debugging information: %s\n", debug_info ? debug_info : "none"); g_clear_error (&err); g_free (debug_info); break; case GST_MESSAGE_EOS: g_print ("End-Of-Stream reached.\n"); break; default: /* We should not reach here because we only asked for ERRORs and EOS */ g_printerr ("Unexpected message received.\n"); break; } } } } // clean up gst_element_set_state (mySinkPipeline, GST_STATE_NULL); gst_object_unref (GST_OBJECT (mySinkPipeline)); //g_main_loop_unref (loop); return 0; } On Wed, Sep 28, 2016 at 10:38 AM, Doug Wood <<a href="/user/SendEmail.jtp?type=node&node=4679895&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>> wrote: <div class='shrinkable-quote'> > Tim, > > Your alternative suggestion looks like it might nicely fit my needs. I > am already supporting playback to a local window in conjunction with > the udpSink just in 2 independent pipelines. I assume that if I want > to modify my existing pipeline that plays to a local window to also > support the intervideosink then I will have to tee the pipleline. > > I will give this coupling approach a try. > > Thanks a lot, > Doug > > On Tue, Sep 27, 2016 at 5:37 PM, Tim Müller [via GStreamer-devel] > <<a href="/user/SendEmail.jtp?type=node&node=4679895&i=1" target="_top" rel="nofollow" link="external">[hidden email]</a>> wrote: >> On Tue, 2016-09-27 at 12:54 -0700, doubledw wrote: >> >> Hi, >> >> At first glance it looks like the encoder not handling seeks / flushing >> properly. >> >> I have something else for you to try which might work better for you: >> >> Create two separate pipelines in the same application - one that >> encodes/streams and one that decodes/seeks/etc. >> >> In the playback pipeline you use intervideosink as video sink, and in >> the encoding pipeline you use intervideosrc as source element. >> >> The video data from the intervideosink will be sent to the >> intervideosrc, but both are decoupled, so if you pause the playback >> pipeline, the streaming pipeline will just keep repeating and streaming >> the last frame (or go black after a while, depending what you set the >> timeout to). If you seek on the playback pipeline the streaming part >> will repeat the last frame until the seek is complete and then output >> frames from the new position (but with monotonically increasing >> timestamps, so the encoder will never know there was a discontinuity). >> If you play back at half speed or double speed, the streaming part will >> encode that at the playback speed and stream it out normally. >> >> For the decoding pipeline you can just use a playbin element and set >> the "video-sink" property to an intervideosink (GstElement *). >> >> On the streaming pipeline you want something like: >> >> intervideosrc ! video/x-raw,framerate=25/1 ! videoconvert >> ! avenc_mpeg2video ! mpegtsmux ! udpsink >> >> If you want audio as well, there's also interaudiosink/src which work >> the same way. >> >> Good luck! >> >> Cheers >> -Tim >> >> -- >> Tim Müller, Centricular Ltd - <a href="http://www.centricular.com" target="_top" rel="nofollow" link="external">http://www.centricular.com</a> >> >> Join us at the GStreamer Conference! >> 10-11 October 2016 in Berlin, >> Germany >> <a href="http://gstreamer.freedesktop.org/conference/" target="_top" rel="nofollow" link="external">http://gstreamer.freedesktop.org/conference/</a> >> >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_top" rel="nofollow" link="external">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> >> >> >> ________________________________ >> If you reply to this email, your message will be added to the discussion >> below: >> <a href="http://gstreamer-devel.966125.n4.nabble.com/Seeking-when-streaming-to-udpSink-tp4678702p4679823.html" target="_top" rel="nofollow" link="external">http://gstreamer-devel.966125.n4.nabble.com/Seeking-when-streaming-to-udpSink-tp4678702p4679823.html</a> >> To unsubscribe from Seeking when streaming to udpSink, click here. >> NAML > > > > -- > Doug Wood | Principal Software Engineer > VT MÄK | 150 Cambridge Park Drive, Third Floor, Cambridge, MA 02140 > T: +1.407.359.2725 / +1.617.876.8085 > <a href="/user/SendEmail.jtp?type=node&node=4679895&i=2" target="_top" rel="nofollow" link="external">[hidden email]</a> | www.mak.com </div> -- Doug Wood | Principal Software Engineer VT MÄK | 150 Cambridge Park Drive, Third Floor, Cambridge, MA 02140 T: +1.407.359.2725 / +1.617.876.8085 <a href="/user/SendEmail.jtp?type=node&node=4679895&i=3" target="_top" rel="nofollow" link="external">[hidden email]</a> | www.mak.com <hr align="left" width="300" /> View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/Seeking-when-streaming-to-udpSink-tp4678702p4679895.html">Re: Seeking when streaming to udpSink</a> Sent from the <a href="http://gstreamer-devel.966125.n4.nabble.com/">GStreamer-devel mailing list archive</a> at Nabble.com.